Display screen or a portion thereof with graphical user interface



FIG. 1 is a view of a display screen or a portion thereof with graphical user interface; and,

FIG. 2 is a view of a second embodiment thereof.

The outer broken line represents a display screen or a portion thereof and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or a portion thereof with graphical user interface, as shown and described. 